| dmo | RoboCell Demo Data |
| dmo | TI Derive Demo |
| dmp | DB/TextWorks Exported Records File |
| dmp | Steam Client Dump Data |
| dmp | Windows Memory Dump |
| dmpx | Oracle Database Application Dump |
| dmr | Inertial Explorer DMI Data |
| dms | WRAP DAY Message Data |
| dmsk | DivX Player Temporary Video Data |
| dmt | Delcam 3D Machining Triangles Data |
| dmtemplate | Direct Mail Template |
| dmu | IBM Cognos Deployment Manager Unpack Settings Data |
| dmu | Musicnizer Database |
| dmv | Adobe Acrobat Parsing Rules |
| dmw | Datamass Ag Data |
| dmx-info | DriverMax Driver Information |
| dmy | LTSTDB Time Series Data |
| dn | Adobe Dimension Model Data |
| dna | BioPerl DNA Sequence Data |
| dna | Desktop DNA Data Storage |
| dna | GenePool DNA Data |
| dna | SnapGene DNA Data |
| dnasym | Desktop DNA Compiled Application Script |
| dnax | Desktop DNA Exclusion List |
| dnb | Microsoft Windows Binary DNS Database |
| dnc | DANCE Database |
| dnd | ClustalW2 Guide Tree Data |
| dne | Netica ASCII Text Data |
| dnet | Netica ASCII Text Data |
| dnk | KillAd Data |
| dnl | Concordance Database |
| dnn | DotNetNuke Manifest Data |
| dnp | Neat Image Device Noise Profile |
| dns | Microsoft Windows DNS Server Database |
| dntu | DameWare NT Utilities Data |
